Recovery of Trace DNA on Clothing: A Comparison of Mini‐tape Lifting and Three Other Forensic Evidence Collection Techniques

Trace DNA is often found in forensic science investigations. Experience has shown that it is difficult to retrieve a DNA profile when trace DNA is collected from clothing. The aim of this study was to compare four different DNA collection techniques on six different types of clothing in order to determine the best trace DNA recovery method. The classical stain recovery technique using a wet cotton swab was tested against dry swabbing, scraping and a new method, referred to as the mini‐tape lifting technique. Physical contact was simulated with three different “perpetrators” on 18 machine‐washed garments. DNA was collected with the four different DNA recovery methods and subjected to standard PCR‐based DNA profiling. The comparison of STR results showed best results for the mini‐tape lifting and scraping methods independent of the type of clothing. The new mini‐tape lifting technique proved to be an easy and reliable DNA collection method for textiles.     

A Rare Case of Poisoning with a Volatile Substance: Quantitative Determination of n‐Butane in Postmortem Tissue

Poisoning with volatile substances remains exceptional. Authors report the case of a married couple who were found in a car with a butane gas bottle: the woman was dead and her husband alleged it was an unsuccessful suicide pact. A specific research of volatile substances on postmortem samples with headspace gas chromatography–mass spectrometry following a quantitative determination was performed. The n‐butane concentrations detected were composed of 610 μg/L (cardiac blood), 50 μg/kg (brain), 134 μg/kg (lungs), 285 μg/kg (liver), and 4090 μg/kg (heart) and were compatible with the rare lethal concentrations evoked in the literature. The cause of death was determined to be asphyxiation through n‐butane criminal poisoning. Authors recommendation therefore is to take samples immediately and place them in properly sealed containers and hence analyzing the samples as soon as possible after collecting them or storing them under ?30°C (?22°F) if analyses cannot be performed immediately.     

Cheiloscopy: Lip Print Inter‐rater Reliability

Lip print analysis, or cheiloscopy, has the potential to join fingerprints and retinal scans as an additional method to determine human identification. This preliminary study sought to determine agreement among 20 raters, forensic odontologists, using an often referenced system that categorizes lip prints into six classes related to the dominant pattern of vertical, horizontal, and intersecting lines. Lip prints were taken from 13 individuals, and raters categorized eight distinct regions of each print. In addition to ratings made while viewing the actual prints, the raters repeated the exercise using photographs of the lip prints. Multirater kappa, a chance‐corrected measure of agreement, ranged between 0.15 for the actual prints and 0.25 for the photos, indicating only poor to fair levels of inter‐rater reliability. While these results fail to support the use of lip prints for human identification, it is possible that more intensive training may yet produce adequate levels of reliability.     

Profile of Hospital Admissions due to Self‐Inflicted Harm in Los Angeles County from 2001 to 2010

We aimed to describe the demographic profile of self‐inflicted harm (SIH) in Los Angeles County between 2001 and 2010 and to investigate trends over this 10‐year period. We used the California Hospital Discharge Data to investigate all cases of hospital admission due to SIH, including suicide attempts and if they had a concurrent psychiatric diagnosis based on ICD‐9 codes. African‐Americans (AA) had the highest 10‐year SIH admission rates. SIH admission rates remained steady throughout the 10‐year study period. Median age of SIH was significantly lower in Latinos. Episodic mood disorders were the most common psychiatric comorbidity. The use of solid/liquid poisoning was the most common SIH method among all racial/ethnic groups. We found major disparities in SIH admissions across racial/ethnic subgroups. The importance of programs to identify, prevent, and treat SIH in these groups is discussed.     

Public‐Private Arbitration and the Public Interest under English Law

Together with the increase in the number of public‐private contracts, recent years have seen a marked proliferation in public‐private arbitrations. This article explores the public interest implications which may arise in such arbitrations and examines how public‐private arbitration is treated under English law. We argue that, due to the lack of a developed administrative law sphere in England and the historical development of arbitration as an exclusively private mode of dispute resolution, the current legal framework of arbitration in England has developed around the private law paradigm of a commercial dispute involving private actors. This private law paradigm results in a conceptual and legal void in respect of how public interest is accounted for, and protected, in arbitrations involving public bodies under English law. Therefore, we suggest that English arbitration law needs to be amended to adequately protect the private interest in public‐private arbitration.     

Estimating the Skull‐to‐Camera Distance from Facial Photographs for Craniofacial Superimposition

The overlay of a skull and a face image for identification purposes requires similar subject‐to‐camera distances (SCD) to be used at both photographic sessions so that differences in perspective do not compromise the anatomical comparisons. As the facial photograph is the reference standard, it is crucial to determine its SCD first and apply this value to photography of the skull. So far, such a method for estimating the SCD has been elusive (some say impossible), compromising the technical validity of the superimposition procedure. This paper tests the feasibility of using the palpebral fissure length and a well‐established photographic algorithm to accurately estimate the SCD from the facial photograph. Recordings at known SCD across a 1–10 m range (repeated under two test conditions) demonstrate that the newly formulated method works: a mean SCD estimation error of 7% that translates into <1% perspective distortion error between estimated and actual conditions.     

Self‐Embedding Behavior in Adults: A Report of Two Cases and a Systematic Review

Self‐embedding behavior (SEB) is the repeated insertion of sharp objects, such as needles or pins, into the soft tissues of abdomen, limbs, and other body parts. In this study, two cases of SEB were reported and the scientific worldwide literature reviewed. Thirty‐two cases of SEB were identified through systematic searches in the main bibliographic databases. Mean age was 35 years (SD = 8.97). Just over two‐thirds of the patients were female. Although the number of embedded objects could be as high as 200, major clinical and surgical complications were uncommon and mortality was null. Patients with SEB presented three major diagnoses: psychotic (25%), personality (21.9%), and factitious (28.1%) disorders. The practice of SEB largely went undetected as the patients themselves did not bring it to the attention of family members or physicians and usually denied they have engaged in SEB. A high level of suspicion is required to avoid a missed diagnosis.     

Determination of Time since Death using Vitreous Humor Tryptophan

Determination of time since death (TSD) plays very important role in forensic examination as it narrows down field of suspects and aids in deceased identification. This study utilizes the fluorescence property of vitreous humor (VH) tryptophan to determine TSD using o‐phthalaldehyde (OPA). The detection limit of these fluorometric studies was found to be 8 ppb indicating sensitivity and high accuracy in TSD determination. The study was performed on selected 76 cadaver with known TSD ranging from 3 to 90 h. Excellent correlation between VH tryptophan and TSD was obtained with a coefficient of correlation R² = 0.9590. Results showed statistically significant increase in vitreous tryptophan with TSD up to 90 h, and the proposed method was efficaciously applied for prediction of TSD as no systematic error exist. The regression equation obtained from the study is [Trp] = 2.21 + 2.98 * TSD.     

The effect of provocation on foreign policy response: A test of the matching hypothesis

Does provocation engender a response in like kind? Research suggests that a matched response is common among rivals and is a preferred strategy in situations which resemble prisoner's dilemma. Yet, there is no empirical evidence for matching outside of rivalry or the use of force. This paper examines the hypothesis that nation‐actors respond to provocation in kind by considering the effect of provocation on foreign policy response for a wide range of conflict behavior and a variety of non‐rival nation‐actors. The thesis is advanced that the unique characteristics of dyadic interaction, specifically threat and involvement, serve to dampen or exaggerate response. Using pooled time series analysis of thirty‐five cases from 1950 to 1975, a test of this hypothesis is made. The results show that high levels of involvement discount threat and promote under reaction while low levels preclude response entirely. Moderate levels both dampen and exaggerate threat perception contingent upon the structure of dyadic interaction. For robustness, eleven illustrative cases are examined to flesh out specific dyadic variation. Finally, for comparison, the U.S.‐Sovict rivalry is also examined and shown to reveal a response pattern which includes a retaliatory memory.     

Mapping foreign policy behavior: An assessment and evaluation of events structures

Employing events indices for cooperation and conflict from the COPDAB data set, the graphic structuring process established by Steven Brams, and several alternative methods of quantifying the resulting event digraphs, this paper examines the utility of the graphic structuring process in efforts at explanation and prediction. Arguing that if the graphic structure represents an underlying structural order in the foreign policy behavior of states, predictability should exist between the graphic portrayal and other behavioral structures around it. Despite face validity in the sociometric qualities of the digraph results, little predictive capability was uncovered. The paper explains the testing process, disc asses the test results, and proposes alternative uses for the structural mapping procedure.